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#1
June 6th, 2003, 02:29 PM
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gdb questions
here is code:
Code:
char pass[10] = "AAAAA", user[10] = "BBBBB";
if(!strcmp(pass,user))
printf("match\n");
else
printf("no match\n");
-disassembled: 0x804835c <main>: push %ebp 0x804835d <main+1>: mov %esp,%ebp 0x804835f <main+3>: sub $0x28,%esp 0x8048362 <main+6>: and $0xfffffff0,%esp 0x8048365 <main+9>: mov $0x0,%eax 0x804836a <main+14>: sub %eax,%esp 0x804836c <main+16>: mov 0x8048424,%eax 0x8048371 <main+21>: mov %eax,0xffffffe8(%ebp) 0x8048374 <main+24>: mov 0x8048428,%ax 0x804837a <main+30>: mov eax,0xffffffec(%ebp) 0x804837e <main+34>: movl $0x0,0xffffffee(%ebp) 0x8048385 <main+41>: mov 0x804842e,%eax 0x804838a <main+46>: mov %eax,0xffffffd8(%ebp) 0x804838d <main+49>: mov 0x8048432,%ax 0x8048393 <main+55>: mov %ax,0xffffffdc(%ebp) 0x8048397 <main+59>: movl $0x0,0xffffffde(%ebp) 0x804839e <main+66>: sub $0x8,%esp 0x80483a1 <main+69>: lea 0xffffffd8(%ebp),%eax 0x80483a4 <main+72>: push %eax 0x80483a5 <main+73>: lea 0xffffffe8(%ebp),%eax 0x80483a8 <main+76>: push %eax 0x80483a9 <main+77>: call 0x804827c <strcmp> - i am trying to view the contents of variables pass and user right b4 teh call to strcmp(). now usually the arguments are pushed, and then the return address is pushed, but i only see 2 pushes instead of 3? why? and how can i view those variables in gdb? the man pages are flimsy. edit: i just realized this all seems pointless, so explanation: i am trying to extract a password from a binary. not this one, but a different binary that i dont hae the source for.
__________________
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#2
June 6th, 2003, 05:48 PM
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nevermind, cracked the rotten thing myself after a couple hours
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